PRETERITE: Stem-Changing: e - i

Rules:

Stem-changing verbs that end in -ir have a stem-change in the third person of the preterite. The pattern of the change resembles a sandal, so these verbs are also called "sandal" verbs. In this pattern, verbs that are E->IE and E->I in the present tense change E->I in the preterit in the third person: